syzkaller login: [ 32.497939] BUG: Bad rss-counter state mm:00000000ead2c6a5 type:MM_FILEPAGES val:33 [ 32.499174] BUG: Bad rss-counter state mm:00000000ead2c6a5 type:MM_ANONPAGES val:22 [ 32.670701] ================================================================== [ 32.671975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.673216] Read of size 8 at addr ffff88800e1f4d08 by task sshd/220 [ 32.674274] [ 32.674572] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.675732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.677051] Call Trace: [ 32.677482] [ 32.677870] dump_stack_lvl+0x91/0xf0 [ 32.678552] print_report+0xcc/0x620 [ 32.679202] ? __virt_addr_valid+0x102/0x340 [ 32.679953] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.680780] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.681620] kasan_report+0xbe/0xf0 [ 32.682299] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.683144] vma_interval_tree_remove+0xc75/0xec0 [ 32.683961] vma_prepare+0xc54/0x11a0 [ 32.684612] __split_vma+0x5af/0x950 [ 32.685257] ? __pfx___split_vma+0x10/0x10 [ 32.685975] ? mark_lock.part.0+0xef/0x2f50 [ 32.686587] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.687166] ? lock_is_held_type+0x9f/0x120 [ 32.687709] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.688312] ? mtree_range_walk+0x632/0x900 [ 32.688865] ? mas_walk+0x5c7/0x7c0 [ 32.689346] do_vmi_munmap+0x1f1/0x2b0 [ 32.689836] mmap_region+0x1f9/0x2660 [ 32.690327] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.690838] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.691556] ? __pfx_lock_acquire+0x10/0x10 [ 32.692085] ? __pfx_mmap_region+0x10/0x10 [ 32.692613] ? security_mmap_addr+0x7d/0xa0 [ 32.693141] ? get_unmapped_area+0x1f5/0x3f0 [ 32.693693] do_mmap+0x854/0xf00 [ 32.694160] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.694654] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.695214] ksys_mmap_pgoff+0x3af/0x500 [ 32.695720] do_syscall_64+0x3f/0x90 [ 32.696201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.696846] RIP: 0033:0x7fa1c060dd82 [ 32.697303] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 32.699431] RSP: 002b:00007ffd3a154a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.700332] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1c060dd82 [ 32.701180] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1bfa47000 [ 32.702024] RBP: 00007fa1bfa47000 R08: 0000000000000009 R09: 0000000000001000 [ 32.702878] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea4e2f0ec0 [ 32.703731] R13: 00007ffd3a154a30 R14: 00007ffd3a154a60 R15: 00007ffd3a154dc0 [ 32.704579] [ 32.704873] [ 32.705092] Allocated by task 213: [ 32.705522] kasan_save_stack+0x22/0x50 [ 32.706027] kasan_set_track+0x25/0x30 [ 32.706543] __kasan_slab_alloc+0x59/0x70 [ 32.707065] kmem_cache_alloc+0x16b/0x370 [ 32.707584] vm_area_dup+0x20/0x160 [ 32.708044] __split_vma+0x170/0x950 [ 32.708527] split_vma+0xc6/0x110 [ 32.708970] mprotect_fixup+0x8d2/0xb30 [ 32.709471] do_mprotect_pkey+0x87e/0xd40 [ 32.709994] __x64_sys_mprotect+0x78/0xc0 [ 32.710530] do_syscall_64+0x3f/0x90 [ 32.711008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.711649] [ 32.711867] Freed by task 213: [ 32.712255] kasan_save_stack+0x22/0x50 [ 32.712762] kasan_set_track+0x25/0x30 [ 32.713257] kasan_save_free_info+0x2b/0x50 [ 32.713787] __kasan_slab_free+0x10a/0x190 [ 32.714332] kmem_cache_free+0x10d/0x4d0 [ 32.714839] rcu_core+0x8c8/0x2860 [ 32.715288] __do_softirq+0x1b7/0x7d4 [ 32.715769] [ 32.715985] Last potentially related work creation: [ 32.716577] kasan_save_stack+0x22/0x50 [ 32.717088] __kasan_record_aux_stack+0x8e/0xa0 [ 32.717662] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.718323] remove_vma+0x139/0x170 [ 32.718776] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.719352] do_vmi_munmap+0x1f1/0x2b0 [ 32.719846] __vm_munmap+0x138/0x3a0 [ 32.720310] __x64_sys_munmap+0x59/0x80 [ 32.720809] do_syscall_64+0x3f/0x90 [ 32.721282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.721925] [ 32.722149] Second to last potentially related work creation: [ 32.722842] kasan_save_stack+0x22/0x50 [ 32.723360] __kasan_record_aux_stack+0x8e/0xa0 [ 32.723943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.724595] remove_vma+0x139/0x170 [ 32.725054] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.725611] do_vmi_munmap+0x1f1/0x2b0 [ 32.726120] mmap_region+0x1f9/0x2660 [ 32.726613] do_mmap+0x854/0xf00 [ 32.727051] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.727539] ksys_mmap_pgoff+0x3af/0x500 [ 32.728046] do_syscall_64+0x3f/0x90 [ 32.728526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.729170] [ 32.729394] The buggy address belongs to the object at ffff88800e1f4cb0 [ 32.729394] which belongs to the cache vm_area_struct of size 168 [ 32.730878] The buggy address is located 88 bytes inside of [ 32.730878] freed 168-byte region [ffff88800e1f4cb0, ffff88800e1f4d58) [ 32.732283] [ 32.732497] The buggy address belongs to the physical page: [ 32.733158] page:00000000e0940a9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1f4 [ 32.734246] memcg:ffff88800d3e2a01 [ 32.734680] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.735380] page_type: 0xffffffff() [ 32.735832] raw: 0100000000000200 ffff88800879fc80 ffffea00003a0700 dead000000000007 [ 32.736753] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3e2a01 [ 32.737655] page dumped because: kasan: bad access detected [ 32.738334] [ 32.738547] Memory state around the buggy address: [ 32.739124] ffff88800e1f4c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.739972] ffff88800e1f4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.740830] >ffff88800e1f4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.741686] ^ [ 32.742136] ffff88800e1f4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.742994] ffff88800e1f4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.743853] ================================================================== [ 32.745012] Disabling lock debugging due to kernel taint [ 35.034344] BUG: Bad rss-counter state mm:00000000a0a4aa9d type:MM_FILEPAGES val:33 [ 35.035604] BUG: Bad rss-counter state mm:00000000a0a4aa9d type:MM_ANONPAGES val:22 [ 35.506183] BUG: Bad rss-counter state mm:00000000343d4a83 type:MM_FILEPAGES val:33 [ 35.507377] BUG: Bad rss-counter state mm:00000000343d4a83 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37258' (ECDSA) to the list of known hosts. 2023/06/20 07:25:57 fuzzer started 2023/06/20 07:25:57 dialing manager at localhost:44161 2023/06/20 07:25:57 checking machine... 2023/06/20 07:25:57 checking revisions... [ 36.115035] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:25:57 testing simple program... [ 36.151593] cgroup: Unknown subsys name 'net' [ 36.213347] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:25:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f4236938000 RCX=0000000000000000 RDX=ffff888016dc8000 RSI=ffffffff8175ce25 RDI=0000000000000007 RBP=0000000000000043 RSP=ffff88800e9f7cf8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000fe98067 R13=ffff88800f0acda0 R14=ffff88800e9f7df0 R15=0000000000000000 RIP=ffffffff814c081b RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4235d96900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f4236938968 CR3=000000001ca4c000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc0732 RBX=ffffffff85e03994 RCX=ffffffff8186b9c4 RDX=0000000000000000 RSI=ffffffff86141c4e RDI=ffffffff85e03980 RBP=ffffffff85e03980 RSP=ffff88806cf099c0 R8 =ffffffff86141c4e R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000002296b R12=ffffffff85e039ac R13=ffffffff85e03980 R14=ffffffff85e03980 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f5add7c6f20 CR3=000000000c918000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=1a58c990eb6fb6a4534388ce1a150384 XMM02=000000000011c570ec2efd57dc4c00df XMM03=0000000000123eb8788a7e94482e7236 XMM04=a55d4a5ff96b8af900000000000ae988 XMM05=19e9129bd510f2350000000000134d90 XMM06=ff0ac53d4d1a02af0000000000133bf8 XMM07=e042d86d42eb936e0000000000124138 XMM08=788a7e94482e7236000000000011c5d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000